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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8048b724215814d2bb4a2482ea7bffa92c434a4c498e2b94164b43fbee0702fc' 
  AND token = 'WdfwVWRqZNCamNgjb/+ZiLPfxzCOo5MffeJfMRkX6vw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}